800956811 has 2 divisors, whose sum is σ = 800956812. Its totient is φ = 800956810.

The previous prime is 800956787. The next prime is 800956823. The reversal of 800956811 is 118659008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 800956811 - 2²² = 796762507 is a prime.

It is not a weakly prime, because it can be changed into another prime (800956831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400478405 + 400478406.

It is an arithmetic number, because the mean of its divisors is an integer number (400478406).

Almost surely, 2^800956811 is an apocalyptic number.

800956811 is a deficient number, since it is larger than the sum of its proper divisors (1).

800956811 is an equidigital number, since it uses as much as digits as its factorization.

800956811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 800956811 is about 28301.1803817438. The cubic root of 800956811 is about 928.6877128793.

The spelling of 800956811 in words is "eight hundred million, nine hundred fifty-six thousand, eight hundred eleven".